package thread;
//
public class SyncApiDemo {
    public static void main(String[] args) {
        //StringBuilder sb=new StringBuilder();
        StringBuffer sb=new StringBuffer();
        Thread t1=new Thread(){
            public void run(){
                for(int i=0;i<1000;i++){
                    sb.append("abc");
                }
            }
        };
        Thread t2=new Thread(){
            public void run(){
                for(int i=0;i<1000;i++){
                    sb.append("mfk");
                }
            }
        };
        t1.start();
        t2.start();
        try{
            Thread.sleep(50);
        }catch(InterruptedException e){

        }
            System.out.println(sb.length());
        }

    }

